Reduced overhead selective mapping for PAPR reduction

Abstract

Method and apparatus for reduced signaling overhead in PAPR reduction techniques. The apparatus receives, from a transmitter, a signal comprising a set of overhead bits associated with a PAPR reduction sequence applied to a data signal from the signal, wherein the set of overhead bits are distinct from data symbols corresponding to the data signal. The apparatus decodes the set of overhead bits to identify the PAPR reduction sequence applied to the data signal from the signal. The apparatus removes the PAPR reduction sequence applied to the data signal. The apparatus decodes a remaining set of symbols of the data symbols from the signal, wherein the remaining set of symbols are free of the PAPR reduction sequence.

What is claimed is: 
     
       1. An apparatus for wireless communication at a receiver, comprising:
 at least one memory; and 
 at least one processor coupled to the at least one memory and, based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, is configured to cause the apparatus to:
 receive, from a transmitter, a signal comprising a set of overhead bits associated with a peak to average power ratio (PAPR) reduction sequence applied to a data signal from the signal, wherein the set of overhead bits are distinct from data symbols corresponding to the data signal; 
 decode the set of overhead bits to identify the PAPR reduction sequence applied to the data signal from the signal; 
 remove the PAPR reduction sequence applied to the data signal; and 
 decode a remaining set of symbols of the data symbols from the signal, wherein the remaining set of symbols are free of the PAPR reduction sequence. 
 
 
     
     
       2. The apparatus of  claim 1 , further comprising a transceiver coupled to the at least one processor, the transceiver being configured to:
 receive, from the transmitter, the signal comprising the set of overhead bits associated with the PAPR reduction sequence applied to the data signal from the signal, wherein the set of overhead bits are distinct from the data symbols corresponding to the data signal. 
 
     
     
       3. The apparatus of  claim 1 , wherein the at least one processor is configured to:
 receive, from the transmitter, a PAPR reduction configuration associated with the set of overhead bits indicating a location of the set of overhead bits within the data signal. 
 
     
     
       4. The apparatus of  claim 3 , wherein the PAPR reduction configuration is received within at least one of downlink control information (DCI), radio resource control (RRC) signaling, or uplink control information (UCI). 
     
     
       5. The apparatus of  claim 3 , wherein the PAPR reduction configuration is transmitted based on at least one of a lowest modulation and coding scheme (MCS), a distinct coding rate, or a distinct modulation scheme. 
     
     
       6. The apparatus of  claim 1 , wherein the signal comprising the set of overhead bits associated with the PAPR reduction sequence comprises a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH). 
     
     
       7. The apparatus of  claim 1 , wherein the set of overhead bits are included in one or more of consecutive time resources or consecutive frequency resources of the signal. 
     
     
       8. The apparatus of  claim 1 , wherein the set of overhead bits are included in one or more of interleaved time resources or interleaved frequency resources of the signal. 
     
     
       9. A method of wireless communication at a receiver, comprising:
 receiving, from a transmitter, a signal comprising a set of overhead bits associated with a peak to average power ratio (PAPR) reduction sequence applied to a data signal from the signal, wherein the set of overhead bits are distinct from data symbols corresponding to the data signal; 
 decoding the set of overhead bits to identify the PAPR reduction sequence applied to the data signal from the signal; 
 removing the PAPR reduction sequence applied to the data signal; and 
 decoding a remaining set of symbols of the data symbols from the signal, wherein the remaining set of symbols are free of the PAPR reduction sequence. 
 
     
     
       10. The method of  claim 9 , further comprising:
 receiving, from the transmitter, a PAPR reduction configuration associated with the set of overhead bits indicating a location of the set of overhead bits within the data signal. 
 
     
     
       11. The method of  claim 10 , wherein the PAPR reduction configuration is received within at least one of downlink control information (DCI), radio resource control (RRC) signaling, or uplink control information (UCI). 
     
     
       12. The method of  claim 10 , wherein the PAPR reduction configuration is transmitted based on at least one of a lowest modulation and coding scheme (MCS), a distinct coding rate, or a distinct modulation scheme. 
     
     
       13. The method of  claim 9 , wherein the signal comprising the set of overhead bits associated with the PAPR reduction sequence comprises a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH). 
     
     
       14. The method of  claim 9 , wherein the set of overhead bits are included in one or more of consecutive time resources or consecutive frequency resources of the signal. 
     
     
       15. The method of  claim 9 , wherein the set of overhead bits are included in one or more of interleaved time resources or interleaved frequency resources of the signal. 
     
     
       16. An apparatus for wireless communication at a transmitter, comprising:
 at least one memory; and 
 at least one processor coupled to the at least one memory and, based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, is configured to cause the apparatus to:
 calculate a peak to average power ratio (PAPR) for an input data signal based on a plurality of PAPR reduction sequences; 
 select a data signal associated with one of the plurality of PAPR reduction sequences having a lowest PAPR from the plurality of PAPR reduction sequences; and 
 transmit, to a receiver, a signal comprising a set of overhead bits associated with a PAPR reduction sequence applied to the data signal from the signal, wherein the set of overhead bits are distinct from data symbols corresponding to the data signal. 
 
 
     
     
       17. The apparatus of  claim 16 , further comprising a transceiver coupled to the at least one processor, the transceiver being configured to:
 transmit, to the receiver, the signal comprising the set of overhead bits associated with the PAPR reduction sequence applied to the data signal from the signal, wherein the set of overhead bits are distinct from the data symbols corresponding to the data signal. 
 
     
     
       18. The apparatus of  claim 16 , wherein the at least one processor is configured to:
 transmit, to the receiver, a PAPR reduction configuration associated with the set of overhead bits indicating a location of the set of overhead bits within the data signal. 
 
     
     
       19. The apparatus of  claim 18 , wherein the PAPR reduction configuration is transmitted within at least one of downlink control information (DCI), radio resource control (RRC) signaling, or uplink control information (UCI). 
     
     
       20. The apparatus of  claim 18 , wherein the PAPR reduction configuration is transmitted based on at least one of a lowest modulation and coding scheme (MCS), a distinct coding rate, or a distinct modulation scheme. 
     
     
       21. The apparatus of  claim 16 , wherein the signal comprising the set of overhead bits associated with the PAPR reduction sequence comprises a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH). 
     
     
       22. The apparatus of  claim 16 , wherein the set of overhead bits are included in one or more of consecutive time resources or consecutive frequency resources of the signal. 
     
     
       23. The apparatus of  claim 16 , wherein the set of overhead bits are included in one or more of interleaved time resources or interleaved frequency resources of the signal. 
     
     
       24. A method of wireless communication at a transmitter, comprising:
 calculating a peak to average power ratio (PAPR) for an input data signal based on a plurality of PAPR reduction sequences; 
 selecting a data signal associated with one of the plurality of PAPR reduction sequences having a lowest PAPR from the plurality of PAPR reduction sequences; and 
 transmitting, to a receiver, a signal comprising a set of overhead bits associated with a PAPR reduction sequence applied to the data signal from the signal, wherein the set of overhead bits are distinct from data symbols corresponding to the data signal. 
 
     
     
       25. The method of  claim 24 , further comprising:
 transmitting, to the receiver, a PAPR reduction configuration associated with the set of overhead bits indicating a location of the set of overhead bits within the data signal. 
 
     
     
       26. The method of  claim 25 , wherein the PAPR reduction configuration is transmitted within at least one of downlink control information (DCI), radio resource control (RRC) signaling, or uplink control information (UCI). 
     
     
       27. The method of  claim 25 , wherein the PAPR reduction configuration is transmitted based on at least one of a lowest modulation and coding scheme (MCS), a distinct coding rate, or a distinct modulation scheme. 
     
     
       28. The method of  claim 24 , wherein the signal comprising the set of overhead bits associated with the PAPR reduction sequence comprises a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH). 
     
     
       29. The method of  claim 24 , wherein the set of overhead bits are included in one or more of consecutive time resources or consecutive frequency resources of the signal. 
     
     
       30. The method of  claim 24 , wherein the set of overhead bits are included in one or more of interleaved time resources or interleaved frequency resources of the signal.